package com.yz.utils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;

import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.http.HttpStatus;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

/**
 * 返回数据
 */
public class R extends HashMap<String, Object> {
    private static final long serialVersionUID = 1L;

    public R() {
        put("code", 0);
        put("msg", "success");
    }

    public static R error() {
        return error(HttpStatus.SC_INTERNAL_SERVER_ERROR, "未知异常，请联系管理员");
    }

    public static R error(String msg) {
        return error(HttpStatus.SC_INTERNAL_SERVER_ERROR, msg);
    }

    public static R error(int code, String msg) {
        R r = new R();
        r.put("code", code);
        r.put("msg", msg);
        return r;
    }

    public static R ok(String msg) {
        R r = new R();
        r.put("msg", msg);
        return r;
    }

    public static R ok(Map<String, Object> map) {
        R r = new R();
        r.putAll(map);
        return r;
    }

    public static R ok() {
        return new R();
    }

    @Override
    public R put(String key, Object value) {
        super.put(key, value);
        return this;
    }

    public Integer getCode() {
        return (Integer) this.get("code");
    }

    public R setData(Object data) {
        put("data", data);
        return this;
    }

    // 利用
    public <T> T getData(com.fasterxml.jackson.core.type.TypeReference<T> typeReference) throws IOException {
        Object data = get("data");
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL, JsonTypeInfo.As.WRAPPER_ARRAY);
        String s = objectMapper.writeValueAsString(data);
        T t = objectMapper.readValue(s, typeReference);
        return t;
    }

    //利用fastjson进行逆转，
    public <T> T getData(TypeReference<T> typeReference) {
        //默认是map
        Object data = get("data");
        String s = JSON.toJSONString(data);
        T t = JSON.parseObject(s, typeReference);
        return t;
    }

    //利用fastjson进行逆转，自定义返回名 key
    public <T> T getData(String key, TypeReference<T> typeReference) {
        //默认是map
        Object data = get(key);
        String s = JSON.toJSONString(data);
        T t = JSON.parseObject(s, typeReference);
        return t;
    }

}
